Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1b4028bfde81c2…

MALICIOUS

PDF

69.9 KB Created: 2020-08-15 14:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dddc4df04f82f5aa5e48c6bfc3da364 SHA-1: 0d8ce4f344e65cc1b733a1be533f17dfea9c980d SHA-256: ba1b4028bfde81c2145978c406e00e03300d43d87d1a2925ec84df73d0e2afc6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.cc/wb?keyword=dfd%20payroll%20management%20system%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to this malicious site. The presence of a large number of external PDF links also indicates a link farm strategy, likely for SEO poisoning or traffic generation to malicious sites.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=dfd%20payroll%20management%20system%20pdf
    • http://litiras.christianjzanetich.com/uploads/1/3/0/7/130775111/4820315.pdf
    • http://files.sweetretreatsscrapbooking.com/uploads/1/3/1/4/131482941/6473862.pdf
    • http://jalinasa.wcreekoh.com/uploads/1/3/1/1/131164250/kakusiwujabexu_tadudotage_nogewete_remed.pdf
    • http://bizited.somaragdolls.com/uploads/1/3/2/7/132740214/0a914d60783433b.pdf
    • http://nijuwefi.erinumc.com/uploads/1/3/1/3/131383483/guzaruzuzibid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3014/2363/files/30562368686.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/xujovademapivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/vintila_corbul_caderea_constantinopolului.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/burufoledekojusibi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/86240472374.pdf
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/datacamp_courses.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/62180879340.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/simone_de_beauvoir_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/circular_saw_blades_for_cutting_sheet_metal.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/71249732175.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/11014304527.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/7th_grade_math_bell_ringers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0430/8575/8

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c227.bin
289284455135e3aa9e38ee0cdca14a1347dbe536e7083564c16802613e368451
pdf-font-stream PDF embedded font (sfnt) at offset 0xC227 1964 bytes
font_01_sfnt_off0000cb58.bin
aca5e04b7bee1d88c35c73a3302c299ff45add992aac7e3d1a99f68954e4284b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB58 5464 bytes
font_02_sfnt_off0000dded.bin
eddc0efb507195f6a33d67f92dffd69c2d26ef5435ebe1e325c545995040b642
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 13980 bytes